KR102197791B1 - Novel wideband chaotic approach lna with microcontroller compatibility and 5g wireless secure communication device using thereof - Google Patents

Abstract

Microcontroller that outputs a three-phase signal based on a discrete Lorenz system, a DA converter that receives the three-phase signal and converts each of the three-phase signals to analog, and outputs the three-phase signal converted to analog A three-phase signal merging circuit for outputting a chaos signal in which the three-phase signal converted to analog is merged using a polynomial chaos approach and the chaos signal are input, and the chaos signal is amplified. Disclosed is a microcontroller-based broadband chaos low-noise amplification circuit, including a low noise amplifier (LNA) circuit that outputs a broadband chaos signal.

Description

Microcontroller-based broadband chaos low-noise amplification circuit and 5G wireless encryption communication device using the same {NOVEL WIDEBAND CHAOTIC APPROACH LNA WITH MICROCONTROLLER COMPATIBILITY AND 5G WIRELESS SECURE COMMUNICATION DEVICE USING THEREOF}

The present invention relates to a microcontroller-based broadband chaos low-noise amplifier circuit and a 5G wireless encryption communication device using the same.

Chaos is a phenomenon that occurs widely in nonlinear dynamometers, and there have been many theoretical or experimental studies on it over the past decades. Recently, a lot of attention has been paid to research on implementing a chaos system with hardware such as an electric or electronic circuit.

Chaos systems can be largely divided into continuous type and discrete type according to the characteristics of the chaotic signal.

Examples of the continuous chaos system include a Chua circuit and a Lorentz circuit. Such a system can be implemented as a hybrid circuit consisting of passive elements such as inductors, resistors, capacitors, and operational amplifiers.

As a discrete chaos system, an integrated circuit driven by a clock signal, such as a switched capacitor (SC) or switched current (SC) method, has been known. Such circuits are typically driven by non-overlapping two-phase clock signals.

On the other hand, 5G is also called 5th generation mobile communication, and unlike 4G Long Term Evolution (LTE), which uses a frequency of 2 GHz or less, it is a communication that uses millimeter wave frequencies that operate at 26, 28, 38, and 60 GHz. It is characterized by having a significantly faster transmission and response speed compared to the existing communication method, and this is expected to enable commercialization of various technologies that were difficult to implement with the existing communication technology.

Chaos System provides a wealth of tools for signal design and generation for communication and signal processing applications, so Chaos System can be a solution for 5G secure communication.

Registered Patent Publication No. 10-0931567, 2009.12.04

The problem to be solved by the present invention is to provide a microcontroller-based broadband chaos low-noise amplifier circuit and a 5G wireless encryption communication device using the same.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

The microcontroller-based broadband chaos low-noise amplification circuit according to an aspect of the present invention for solving the above-described problem is a microcontroller that outputs a three-phase signal based on a discrete Lorenz system, and receives the three-phase signal. , A digital to analog (DA) converter that converts and outputs each of the three-phase signals into analog, receives the three-phase signal converted to analog, and converts the three to analog using a polynomial chaos approach. And a three-phase signal merging circuit for outputting a chaotic signal obtained by merging phase signals, and a low noise amplifier (LNA) circuit for receiving the chaotic signal and amplifying the chaotic signal to output a broadband chaotic signal.

In addition, the microcontroller may allocate at least one port to output the three-phase signal, and output the three-phase signal to the at least one allocated port.

In addition, the three-phase output includes an X-phase, Y-phase and Z-phase, the DA converter,

The X-phase output is connected to at least one port assigned, the X-phase DA converter for converting the X-phase output to analog, the Y-phase output is connected to at least one port assigned, the Y-phase It may include a Y-phase DA converter for converting the output to analog and a Z-phase DA converter connected to at least one port to which the Z-phase output is assigned, and converts the Z-phase output to analog.

In addition, the microcontroller includes a Lorentz system composed of a dynamic system including three ordinary differential equations as shown in Equation 1 below,

[Equation 1]

The three-phase signal may be generated based on a discrete Lorentz system discretized based on Euler methodology as shown in Equation 3 below.

[Equation 3]

In addition, the parameter p of Equation 1 may be set to 10, the parameter r may be set to 30, and the parameter b may be set to 2.66.

In addition, the LNA circuit may include a plurality of microstrip lines.

According to an aspect of the present invention for solving the above-described problem, a 5G wireless encryption communication device is provided that performs message encryption for 5G secure communication using a microcontroller-based broadband chaos low-noise amplification circuit according to the disclosed embodiment. .

Other specific details of the present invention are included in the detailed description and drawings.

According to the disclosed embodiment, there is an effect of providing an algorithm, a circuit, and a device using the same that enable 5G encrypted communication based on a chaos signal.

In addition, by discretizing the Lorentz system, there is an effect that it can be applied to a microcontroller, and there is an effect of obtaining a wideband chaos coded signal with reduced noise by using an LNA.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a diagram illustrating a microcontroller-based broadband chaos low noise amplification circuit according to an exemplary embodiment.
2 is a flow chart illustrating an algorithm performed in a microcontroller.
3 is a diagram illustrating an example of a circuit including a microcontroller.
4 is a diagram illustrating an example of a chaotic signal output from a three-phase signal merging circuit.
5 is a diagram illustrating an example of a method of configuring an LNA circuit.
6 and 7 are graphs showing the analysis results of the LNA circuit.

The term "unit" or "module" used in the specification refers to a hardware component such as software, FPGA or ASIC, and the "unit" or "module" performs certain roles. However, "unit" or "module" is not meant to be limited to software or hardware. The “unit” or “module” may be configured to be in an addressable storage medium, or may be configured to reproduce one or more processors. Thus, as an example, "sub" or "module" refers to components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, It includes procedures, subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays and variables. Components and functions provided within "sub" or "module" may be combined into a smaller number of components and "sub" or "modules" or into additional components and "sub" or "modules". Can be further separated.

In the following, some embodiments will be described clearly and in detail with reference to the accompanying drawings so that those with ordinary knowledge in the technical field to which the present invention pertains (hereinafter, ordinary technicians) can easily implement the present invention. will be.

1 is a diagram illustrating a microcontroller-based broadband chaos low noise amplification circuit according to an exemplary embodiment.

Referring to FIG. 1, a microcontroller-based broadband chaos low noise amplification circuit 100 includes a microcontroller 110, a digital to analog (DA) converter 120, a three-phase signal merging circuit 130, and a low noise amplifier (LNA). Circuit 140.

In an embodiment, the microcontroller 110 may be a control device including at least one processor, but is not limited to a specific type of control device.

In an embodiment, the microcontroller 110 includes a processor and a memory, and the processor executes one or more instructions stored in the memory to perform operations of the microcontroller 110 described herein.

In one embodiment, the microcontroller 110 outputs a three-phase signal based on a discrete Lorenz system.

The Lorentz system is generally composed of a dynamics system including three ordinary differential equations as shown in Equation 1 below, and is classified as a type of continuous chaos system.

In Equation 1 above, p, r, and b are parameters and may be initialized to specific values. In a preferred embodiment, the parameter p of Equation 1 may be set to 10, the parameter r may be set to 30, and the parameter b may be set to 2.66, but the present invention is not limited thereto.

Equation 2 below shows the Lorentz system in a frequency domain.

In Equation 2 above, a is a dilation factor, and a value greater than 1 is maintained to control frequency spreading.

In an embodiment, a Chaos system is used to provide a 5G wireless cryptographic communication device based on the Lorentz system, and among them, a Lorentz oscillator based on the Lorentz system is used.

However, in order to provide 5G wireless cryptographic communication in various devices, it is necessary to apply the Lorentz oscillator to the microcontroller 110. Accordingly, the Lorentz system can be discretized as shown in Equation 3 below based on the Euler methodology.

The microcontroller 110 may generate a three-phase output signal based on the discrete Lorentz system.

In one embodiment, the three-phase output may include X-phase, Y-phase and Z-phase.

2 is a flow chart showing an algorithm performed in a microcontroller.

Each of the steps shown in FIG. 2 shows an algorithm performed in the microcontroller 110 in time series.

In step S210, the microcontroller 110 performs an initialization operation.

In step S220, the microcontroller 110 performs parameter initialization. For example, the microcontroller 110 may initialize the parameters p, r, and b of Equation 1 to 10, 30, and 2.66, respectively, but is not limited thereto.

In step S230, the microcontroller 110 may perform an operation based on the Lawrence system. For example, the microcontroller 110 may perform an operation of the Lawrence system, such as Equation 1, based on the parameter initialized in step S220.

In step S240, the microcontroller 110 may perform an operation of the discrete Lorentz system. For example, the microcontroller 110 may perform an operation based on Equation 3 above.

The microcontroller 110 may obtain a three-phase output signal as a result of an operation, and the three-phase output signal may include operation results for x, y, and z variables, respectively.

In step S250, the microcontroller 110 may allocate an output port for each phase, that is, for each variable. The number of ports allocated is not limited, and may be allocated differently according to the type of microcontroller and the type of data to be output.

For example, the microcontroller 110 is PIC18F4520, and B, C, and D ports may be assigned to each variable, but the present invention is not limited thereto.

In step S260, the microcontroller 110 inputs an existing value to a new value.

In step S270, the microcontroller 110 checks whether the controller is reset, ends the step when the controller is reset, and if the controller is not reset, each step may be performed again from step S230.

The steps of the method or algorithm described in connection with FIG. 2 may be implemented directly in hardware, implemented as a software module executed by hardware, or a combination thereof. Software modules include Random Access Memory (RAM), Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), Flash Memory, hard disk, removable disk, CD-ROM, or It may reside on any type of computer-readable recording medium well known in the art to which the present invention pertains.

In addition, components of the algorithm described with reference to FIG. 2 may be implemented as a program (or application) and stored in a medium to be executed in combination with a computer that is hardware. Components of the present invention may be implemented as software programming or software elements, and similarly, embodiments include various algorithms implemented with a combination of data structures, processes, routines or other programming elements, including C, C++ , Java, assembler, or the like may be implemented in a programming or scripting language. Functional aspects can be implemented with an algorithm running on one or more processors.

Referring back to FIG. 1, each port of the microcontroller 110 receives a three-phase signal output from the microcontroller 110, and a DA converter 120 that converts each of the input three-phase signals into analog and outputs them. Can be connected.

Referring to the embodiment shown in FIG. 1, the DA converter 120 is connected to one or more ports to which an X-phase output is assigned, and an X-phase DA converter 122 for converting the X-phase output into analog, Y -Phase output is connected to one or more ports assigned, Y-phase DA converter 124 for converting Y-phase output to analog and Z-phase output is connected to at least one port assigned, and Z-phase output It may include a Z-phase DA converter 126 for converting to analog.

In one embodiment, the X-phase DA converter 122 is connected to the port B of the microcontroller 110, the Y-phase DA converter 124 is connected to the port C of the microcontroller 110, and the Z-phase The DA converter 126 may be connected to each port D of the microcontroller 110, but is not limited thereto.

In an embodiment, each of the converters 122, 124, and 126 included in the DA converter 120 receives a signal converted to analog from the DA converter 120, and uses a polynomial chaos approach. Thus, it is connected to a three-phase signal merging circuit 130 that outputs a chaos signal obtained by merging the three-phase signal converted to analog.

3 is a diagram illustrating an example of a circuit including a microcontroller.

3, the microcontroller 110 and the X-phase DA converter 122, Y-phase DA converter 124, and Z-phase DA converter 126 connected to each port of the microcontroller 110 are shown. Has been.

According to the embodiment shown in FIG. 3, the X-phase DA converter 122, the Y-phase DA converter 124, and the Z-phase DA converter 126 are connected to eight ports of the microcontroller 110, respectively. have. For example, the X-phase DA converter 122, Y-phase DA converter 124, and Z-phase DA converter 126 may be connected to each of eight ports of port B, port C, and port D, respectively, It is not limited thereto.

X-phase DA converter 122, Y-phase DA converter 124, and Z-phase DA converter 126 calculate x, y and z variables, respectively, according to the calculation result of the discrete Lorentz system from the microcontroller 110 A discrete signal (digital signal) corresponding to the result is obtained, converted into an analog signal, and transmitted to the three-phase signal merging circuit 130.

The three-phase signal merging circuit 130 merges signals input from the X-phase DA converter 122, the Y-phase DA converter 124, and the Z-phase DA converter 126 to generate a chaotic output signal Cout. And output. A polynomial chaos approach may be used for signal merging, but is not limited thereto.

4 is a diagram illustrating an example of a chaotic signal output from a three-phase signal merging circuit.

Referring to FIG. 4, a chaos signal 300 in the form of an output value of a voltage Cout for each frequency band is shown.

The chaotic signal output from the three-phase signal merging circuit 130 is input to the LNA circuit 140. The LNA circuit 140 receives a chaos signal, amplifies the input chaos signal, and outputs a broadband chaos signal.

Chaos signals are broadband, noisy, and difficult to predict. The LNA circuit 140 may reduce noise of a chaotic signal. For example, when the noise figure of the chaotic signal generated based on the Lorentz system applied to the microcontroller 110 is 5.8 to 5.2 dB, the noise figure of the signal output through the LNA circuit 140 is 4.4. Reduced to 1.5dB.

5 is a diagram illustrating an example of a method of configuring an LNA circuit.

5, the LNA circuit 140 includes at least one CMOS (M'), one or more capacitors C1 to C6, one or more resistors R1 to R3, and one or more microstrip lines (ML1 to C6). ML5).

For example, the LNA circuit 140 receives the chaos signal 310 from the RF_in terminal. For example, the chaotic signal 310 illustrated in FIG. 5 may be obtained by sampling at least a portion of a signal between 0.5 GHz and 0.7 GHz in the chaotic signal 300 of FIG. 4.

The signal processing of the LNA circuit 140 may be started from a probabilistic approximation of an unknown waveform based on random variable expansion as shown in Equation 4 below.

In Equation 4 above, φk is orthogonal to the probability density function of the random parameter. The operation of the circuit having the probability parameter (parameter) can be described as in Equation 5 below.

In Equation 5 above, (ξ) = (ξ1, ???,ξr) is an r-dimensional variable in which all random circuit parameters are collected.

f(x(t, ξ), ξ), u(t) contain independent stimulus and non-linear current, and x(t, ξ) collects the current flowing into the circuit components and the node voltage.

In order to apply a comprehensive approach to the three chaotic outputs (X-phase, Y-phase, Z-phase), polynomial expansion (Equation 4) is substituted into Equation 5, and accordingly, Equation 6 is derived. .

In Equation 6 above, the value of the random parameter is fixed to a specific value of ξ = ξm, and accordingly, Equation 7 below is derived.

In Equation 7 above, amk = φk(ξm), and m is set to a corresponding value.

Accordingly, it is possible to change the variable, and thus Equation 8 is derived.

The separated equation as in Equation 8 above is applied to the LNA circuit 140, and may be repeatedly simulated for r-dimensional variables.

The LNA circuit 140 performs an analysis based on the circuit shown in FIG. 5 based on the selected parameter (r=30).

In one embodiment, the LNA circuit 140 includes microstrip lines ML1 to ML5 that provide component-to-element matching between the input port and the output port. As an example, the LNA circuit 140 may be designed, applied, and simulated based on an Advanced Design System (ADS) platform providing such an environment, but is not limited thereto.

In one embodiment, the LNA circuit 140 may be manufactured based on the 45nm TSMC process, but is not limited thereto.

6 and 7 are graphs showing the analysis results of the LNA circuit.

Referring to FIG. 6, it can be seen that a 5G band is obtained over a broadband of 2 to 10 GHz from the output of the LNA circuit.

Also, referring to FIG. 7, noise analysis results before and after application of the LNA circuit are shown. According to FIG. 7, it is confirmed that the zigzag noise after application of the microcontroller is 5.8 to 5.2 dB, while the noise figure decreases from 4.4 dB to 1.5 dB after the LNA circuit using the polynomial chaos technique is applied.

Accordingly, as shown in FIG. 5, as an output of the LNA circuit 140, a wideband chaotic signal 400 with reduced noise is obtained.

In an embodiment, the microcontroller-based broadband chaos low noise amplification circuit 100 may be used for 5G secure communication.

The chaos signal may be used in various ways for encrypting a message. For example, the transmission side may multiply the chaos signal and the information signal, and then add the chaos signal again to transmit. Accordingly, the receiving side can recover the transmitted signal by subtracting the transmitted signal as the receiving side chaos signal and dividing it again. In this case, synchronization between the sending side and the receiving side must be performed.

However, this is provided as an example, and the encryption method using the chaos signal is not limited thereto.

For example, the microcontroller 110 acquires a signal to be encrypted and generates a chaotic signal based thereon, and accordingly, the LNA circuit 140 may finally output a wideband chaotic encryption signal. have.

That is, a 5G wireless encryption communication device including the microcontroller-based broadband chaos low noise amplification circuit 100 according to the disclosed embodiment and performing message encryption for 5G secure communication based on the microcontroller-based broadband chaos low noise amplification circuit 100 may be provided.

For example, the 5G wireless encryption communication device may be a communication module enabling 5G communication or a computer including a 5G communication module.

In the present specification, a computer refers to all kinds of hardware devices including at least one processor, and may be understood as encompassing a software configuration operating in a corresponding hardware device according to embodiments. For example, the computer may be understood as including all of a smartphone, a tablet PC, a desktop, a laptop, and a user client and an application running on each device, but is not limited thereto. In addition, as a non-limiting embodiment, the computer may further include an embedded system including at least one microcontroller and an IoT device.

In the above, embodiments of the present invention have been described with reference to the accompanying drawings, but those of ordinary skill in the art to which the present invention pertains can be implemented in other specific forms without changing the technical spirit or essential features. You can understand. Therefore, the embodiments described above are illustrative in all respects, and should be understood as non-limiting.

100: Microcontroller-based broadband chaos low-noise amplifier circuit
110: microcontroller
120: DA converter
122: X-phase DA converter
124: Y-phase DA converter
126: Z-phase DA converter
130: 3-phase signal merging circuit
140: LNA

Claims (7)

Outputs three-phase signals of X-phase output, Y-phase output, and Z-phase output based on the discrete Lorenz system, but allocates each of the eight ports to output the three-phase signal, and A microcontroller outputting the three-phase signals through eight ports, respectively;
A digital to analog (DA) converter configured to receive the three-phase signal and convert each of the three-phase signals into analog and output;
A three-phase signal merging circuit for receiving the three-phase signal converted into analog and outputting a chaotic signal obtained by merging the three-phase signal converted to analog using a polynomial chaos approach; And
It includes a low noise amplifier (LNA) circuit for receiving the chaos signal, amplifying the chaos signal and outputting a broadband chaos signal,
The DA converter,
An X-phase DA converter that is connected to eight ports of the microcontroller to which the X-phase output is allocated and converts the X-phase output to analog,
A Y-phase DA converter that is connected to eight ports of the microcontroller to which the Y-phase output is assigned, and converts the Y-phase output to analog, and
A Z-phase DA converter connected to eight ports of the microcontroller to which the Z-phase output is allocated, and converting the Z-phase output to analog,
Microcontroller-based broadband chaos low noise amplifier circuit. delete delete The method of claim 1,
The microcontroller,
A Lorentz system composed of a dynamics system including three ordinary differential equations as shown in Equation 1 below,
[Equation 1]

Generating the three-phase signal based on the discrete Lorentz system discretized based on the Euler methodology as shown in Equation 3 below,
[Equation 3]

Microcontroller-based broadband chaos low noise amplifier circuit. The method of claim 4,
The parameter p of Equation 1 is set to 10, the parameter r is set to 30, and the parameter b is set to 2.66,
Microcontroller-based broadband chaos low noise amplifier circuit. The method of claim 5,
The LNA circuit,
Including a plurality of microstrip lines (microstrip line),
Microcontroller-based broadband chaos low noise amplifier circuit. Performing message encryption for 5G secure communication using the microcontroller-based broadband chaos low noise amplification circuit of claim 1,
5G wireless cryptographic communication device.

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